Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec297cd60be3d304…

MALICIOUS

PDF

39.6 KB Created: 2021-05-12 07:46:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: faed41b09a30dbf925bf887637b3156e SHA-1: b39b2da4af9c58c99de510c3975c4b300fd51d0c SHA-256: ec297cd60be3d304e2787a9c2bb604f315b0a28a8486c22ca128587bb370f2ef
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to malicious redirector infrastructure, specifically promoting a 'Coin Master Hack'. The document body and heuristics indicate a lure to download a payload, likely exploiting a client execution vulnerability. The embedded links strongly suggest a phishing or social engineering attempt to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/coin-master-hack-ios-jailbreak-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000346f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x346F 24880 bytes
SHA-256: 7f8e08b6ca6efca6e5b2fe77e1080a3d34abc841ef98e466aada9cb5e1d40cb1
font_01_sfnt_off00006c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5D 4020 bytes
SHA-256: dbaa9c12d07f3632734605f1d5d6dee3ad5af1f57488e46d95dab68b383f08c5
font_02_sfnt_off000079e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79E5 18112 bytes
SHA-256: 1b0308d5ac0dfb41a556ba6c26081d7047b70f811c924827bde711dbba141842

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